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Populating is_multiple in google_breakpad::StackFrame from symbol files.

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This is needed in order to properly detect and highlight frames that
correspond to multiple functions, for example as the result of identical
code folding by the linker.

Bug: google-breakpad:751
Change-Id: I2ee7c147fcff6493c2454383ad5422b38269759a
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/3471034
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
This commit is contained in:
Ivan Penkov 2022-02-17 03:18:03 +00:00
parent 34af6bcff1
commit fc1b9d3203
6 changed files with 35 additions and 12 deletions
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9
src/google_breakpad/processor/stack_frame.h
View file

@ -63,7 +63,8 @@ struct StackFrame {
source_file_name(),
source_line(0),
source_line_base(),
trust(FRAME_TRUST_NONE){}
trust(FRAME_TRUST_NONE),
is_multiple(false) {}
virtual ~StackFrame() {}
// Return a string describing how this stack frame was found
@ -140,6 +141,12 @@ struct StackFrame {
// Amount of trust the stack walker has in the instruction pointer
// of this frame.
FrameTrust trust;
// True if the frame corresponds to multiple functions, for example as the
// result of identical code folding by the linker. In that case the function
// name, filename, etc. information above represents the state of an arbitrary
// one of these functions.
bool is_multiple;
};
} // namespace google_breakpad

2
src/processor/basic_source_line_resolver.cc
View file

@ -319,6 +319,7 @@ void BasicSourceLineResolver::Module::LookupAddress(
address >= function_base && address - function_base < function_size) {
frame->function_name = func->name;
frame->function_base = frame->module->base_address() + function_base;
frame->is_multiple = func->is_multiple;
linked_ptr<Line> line;
MemAddr line_base;
@ -341,6 +342,7 @@ void BasicSourceLineResolver::Module::LookupAddress(
(!func.get() || public_address > function_base)) {
frame->function_name = public_symbol->name;
frame->function_base = frame->module->base_address() + public_address;
frame->is_multiple = public_symbol->is_multiple;
}
}

8
src/processor/basic_source_line_resolver_unittest.cc
View file

@ -52,7 +52,6 @@ using google_breakpad::CodeModule;
using google_breakpad::MemoryRegion;
using google_breakpad::StackFrame;
using google_breakpad::WindowsFrameInfo;
using google_breakpad::linked_ptr;
using google_breakpad::scoped_ptr;
using google_breakpad::SymbolParseHelper;
@ -196,6 +195,7 @@ TEST_F(TestBasicSourceLineResolver, TestLoadAndResolve)
ASSERT_TRUE(frame.source_file_name.empty());
ASSERT_EQ(frame.source_line, 0);
ASSERT_EQ(frame.source_line_base, 0U);
EXPECT_EQ(frame.is_multiple, false);
frame.module = &module1;
resolver.FillSourceLineInfo(&frame, nullptr);
@ -206,6 +206,7 @@ TEST_F(TestBasicSourceLineResolver, TestLoadAndResolve)
ASSERT_EQ(frame.source_file_name, "file1_1.cc");
ASSERT_EQ(frame.source_line, 44);
ASSERT_EQ(frame.source_line_base, 0x1000U);
EXPECT_EQ(frame.is_multiple, true);
windows_frame_info.reset(resolver.FindWindowsFrameInfo(&frame));
ASSERT_TRUE(windows_frame_info.get());
ASSERT_EQ(windows_frame_info->type_, WindowsFrameInfo::STACK_INFO_FRAME_DATA);
@ -344,6 +345,7 @@ TEST_F(TestBasicSourceLineResolver, TestLoadAndResolve)
frame.module = &module1;
resolver.FillSourceLineInfo(&frame, nullptr);
ASSERT_EQ(frame.function_name, string("PublicSymbol"));
EXPECT_EQ(frame.is_multiple, true);
frame.instruction = 0x4000;
frame.module = &module1;
@ -360,6 +362,7 @@ TEST_F(TestBasicSourceLineResolver, TestLoadAndResolve)
ASSERT_EQ(frame.source_file_name, "file2_2.cc");
ASSERT_EQ(frame.source_line, 21);
ASSERT_EQ(frame.source_line_base, 0x2180U);
EXPECT_EQ(frame.is_multiple, false);
windows_frame_info.reset(resolver.FindWindowsFrameInfo(&frame));
ASSERT_TRUE(windows_frame_info.get());
ASSERT_EQ(windows_frame_info->type_, WindowsFrameInfo::STACK_INFO_FRAME_DATA);
@ -368,6 +371,7 @@ TEST_F(TestBasicSourceLineResolver, TestLoadAndResolve)
frame.instruction = 0x216f;
resolver.FillSourceLineInfo(&frame, nullptr);
ASSERT_EQ(frame.function_name, "Public2_1");
EXPECT_EQ(frame.is_multiple, false);
ClearSourceLineInfo(&frame);
frame.instruction = 0x219f;
@ -431,6 +435,7 @@ TEST_F(TestBasicSourceLineResolver, TestLoadAndResolveOldInlines) {
ASSERT_EQ(frame.source_file_name, "linux_inline.cpp");
ASSERT_EQ(frame.source_line, 42);
ASSERT_EQ(frame.source_line_base, 0x161b6U);
EXPECT_EQ(frame.is_multiple, false);
ASSERT_EQ(inlined_frames.size(), 3UL);
@ -475,6 +480,7 @@ TEST_F(TestBasicSourceLineResolver, TestLoadAndResolveNewInlines) {
ASSERT_EQ(frame.source_file_name, "a.cpp");
ASSERT_EQ(frame.source_line, 42);
ASSERT_EQ(frame.source_line_base, 0x161b6U);
EXPECT_EQ(frame.is_multiple, false);
ASSERT_EQ(inlined_frames.size(), 3UL);

2
src/processor/fast_source_line_resolver.cc
View file

@ -88,6 +88,7 @@ void FastSourceLineResolver::Module::LookupAddress(
func->CopyFrom(func_ptr);
frame->function_name = func->name;
frame->function_base = frame->module->base_address() + function_base;
frame->is_multiple = func->is_multiple;
scoped_ptr<Line> line(new Line);
const Line* line_ptr = 0;
@ -112,6 +113,7 @@ void FastSourceLineResolver::Module::LookupAddress(
public_symbol->CopyFrom(public_symbol_ptr);
frame->function_name = public_symbol->name;
frame->function_base = frame->module->base_address() + public_address;
frame->is_multiple = public_symbol->is_multiple;
}
}

8
src/processor/fast_source_line_resolver_unittest.cc
View file

@ -64,7 +64,6 @@ using google_breakpad::CodeModule;
using google_breakpad::MemoryRegion;
using google_breakpad::StackFrame;
using google_breakpad::WindowsFrameInfo;
using google_breakpad::linked_ptr;
using google_breakpad::scoped_ptr;
class TestCodeModule : public CodeModule {
@ -224,6 +223,7 @@ TEST_F(TestFastSourceLineResolver, TestLoadAndResolve) {
ASSERT_TRUE(frame.source_file_name.empty());
ASSERT_EQ(frame.source_line, 0);
ASSERT_EQ(frame.source_line_base, 0U);
ASSERT_EQ(frame.is_multiple, false);
frame.module = &module1;
fast_resolver.FillSourceLineInfo(&frame, nullptr);
@ -234,6 +234,7 @@ TEST_F(TestFastSourceLineResolver, TestLoadAndResolve) {
ASSERT_EQ(frame.source_file_name, "file1_1.cc");
ASSERT_EQ(frame.source_line, 44);
ASSERT_EQ(frame.source_line_base, 0x1000U);
ASSERT_EQ(frame.is_multiple, true);
windows_frame_info.reset(fast_resolver.FindWindowsFrameInfo(&frame));
ASSERT_TRUE(windows_frame_info.get());
ASSERT_FALSE(windows_frame_info->allocates_base_pointer);
@ -371,6 +372,7 @@ TEST_F(TestFastSourceLineResolver, TestLoadAndResolve) {
frame.module = &module1;
fast_resolver.FillSourceLineInfo(&frame, nullptr);
ASSERT_EQ(frame.function_name, string("PublicSymbol"));
EXPECT_EQ(frame.is_multiple, true);
frame.instruction = 0x4000;
frame.module = &module1;
@ -387,6 +389,7 @@ TEST_F(TestFastSourceLineResolver, TestLoadAndResolve) {
ASSERT_EQ(frame.source_file_name, "file2_2.cc");
ASSERT_EQ(frame.source_line, 21);
ASSERT_EQ(frame.source_line_base, 0x2180U);
ASSERT_EQ(frame.is_multiple, false);
windows_frame_info.reset(fast_resolver.FindWindowsFrameInfo(&frame));
ASSERT_TRUE(windows_frame_info.get());
ASSERT_EQ(windows_frame_info->type_, WindowsFrameInfo::STACK_INFO_FRAME_DATA);
@ -395,6 +398,7 @@ TEST_F(TestFastSourceLineResolver, TestLoadAndResolve) {
frame.instruction = 0x216f;
fast_resolver.FillSourceLineInfo(&frame, nullptr);
ASSERT_EQ(frame.function_name, "Public2_1");
EXPECT_EQ(frame.is_multiple, false);
ClearSourceLineInfo(&frame);
frame.instruction = 0x219f;
@ -433,6 +437,7 @@ TEST_F(TestFastSourceLineResolver, TestLoadAndResolveOldInlines) {
ASSERT_EQ(frame.source_file_name, "linux_inline.cpp");
ASSERT_EQ(frame.source_line, 42);
ASSERT_EQ(frame.source_line_base, 0x161b6U);
ASSERT_EQ(frame.is_multiple, false);
ASSERT_EQ(inlined_frames.size(), 3UL);
@ -484,6 +489,7 @@ TEST_F(TestFastSourceLineResolver, TestLoadAndResolveNewInlines) {
ASSERT_EQ(frame.source_file_name, "a.cpp");
ASSERT_EQ(frame.source_line, 42);
ASSERT_EQ(frame.source_line_base, 0x161b6U);
ASSERT_EQ(frame.is_multiple, false);
ASSERT_EQ(inlined_frames.size(), 3UL);

4
src/processor/testdata/module1.out vendored
View file

@ -3,7 +3,7 @@ INFO CODE_ID FFFFFFFF module1.exe
FILE 1 file1_1.cc
FILE 2 file1_2.cc
FILE 3 file1_3.cc
FUNC 1000 c 0 Function1_1
FUNC m 1000 c 0 Function1_1
1000 4 44 1
1004 4 45 1
1008 4 46 1
@ -14,7 +14,7 @@ FUNC 1200 100 8 Function1_3
FUNC 1300 100 c Function1_4
FUNC 2000 0 0 Test_Zero_Size_Function_Is_Ignored
2000 4 88 2
PUBLIC 2800 0 PublicSymbol
PUBLIC m 2800 0 PublicSymbol
FUNC 3000 7000 42 LargeFunction
3000 7000 4098359 3
STACK WIN 4 1000 c 1 0 0 0 0 0 1 $eip 4 + ^ = $esp $ebp 8 + = $ebp $ebp ^ =